摘要
为研究多孔介质中火焰面倾斜演变及出现倾斜演变的原因,建立了二维碳化硅堆积小球的多孔介质燃烧器双温模型,对预混气体在燃烧器内的流动、传热和燃烧进行模拟.分析火焰面倾斜演变,并从温度场、气体流速场、压力场三个方面对火焰面出现倾斜演变现象进行分析.结果表明:给定初始倾斜角的火焰面会持续发展,出现更严重的倾斜现象;温度场、气体流速场、动压场通过影响燃烧化学反应速度、气体流动方向、壁面散热等间接影响火焰面的倾斜演变,导致火焰面倾斜的持续发展.
In order to study the evolution of inclinational flame during propagation of a filtration combustion wave in porous media and the causes of the evolution,a two-temperature and two-dimensional numerical model was established.A 500 mm-long quartz tube with 40mm in diameter was used as the burner model which was filled with grained carborundum（SiC）.The software Fluent was used to simulate the combustion,fluid flow and heat transfer of filtration combustion.The evolution of inclinational flame and the reasons causing this evolution were analyzed from three aspects of temperature field,gas velocity field and pressure field,respectively.Temperature field,gas velocity field and pressure field can affect the chemical reaction rate,the direction of gas flow and heat loss at the walls,etc.,and further can affect the evolution of inclinational flame.These factors can advance the continuous development of the inclination.The results show that,if an initial inclination is set,the inclination of flame will progress and become more serious.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第2期252-256,270,共6页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51076109
51176026)
辽宁省高等学校优秀人才支持计划项目(LJQ2011135)
关键词
多孔介质
火焰面倾斜
火焰传播
过滤燃烧
porous media
flame inclination
flame propagation
filtration combustion
